File:Treatise on marine and naval architecture, or, Theory and practice blended in ship building. Illustrated with more than 50 engravings (1852) (14769343392).jpg

Identifier: treatiseonmarine00grif (find matches)
Title: Treatise on marine and naval architecture, or, Theory and practice blended in ship building. Illustrated with more than 50 engravings
Year: 1852 (1850s)
Authors: Griffiths, John W. (John Willis), 1809-1882
Subjects: Naval architecture
Publisher: New York : D. Appleton
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive

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thewind quick, and in this respect shewould have the advantage of the pilot-boat or other vertically sharp vessel;not only so, but by having more bilge ;more side surface is presented, whichaugments the rotundity we have ap-preciated for working quick. Butagain, it may be said the flat surfaceis also increased that has been repu-diated. To this we in reply would onlysay, that the flat is increased transverse-ly, but need not be longitudinally, inas-much as the lines of resistance on theflat vessel run more nearly in the di-rection of section lines, while on thesharper vessel they run in the directionof diagonal lines ; they may each alikebe divested of the straight as soon aswe fairly get clear of the influence ofthe base-line; the transversely flatbottom we have shown is an advantagefor stability. It must not be inferred iWm whathas been shown that the vessels en-gaged in river navigation are entirelyfree from discrepancies ; but we feelquite safe in the assertion, that they» » **
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. MARINE AND NAVAL ARCHITECTURE 359 pierced. A practical builder wouldnever think of sparring-two ships alike,because they were of the same princi-pal dimensions, without reference tothe model; and yet this has been thestereotyped practice for years in theNavies of both the Old and NewWorld. That it is less difficult to con-struct vessels for the avowed purposesof war, will appear manifest, if we butconsider the objects to be attained ;first, the vessel shall possess the neces- * sary quality of being able to carry andwork her guns in all weathers ; thiscalls for stability, both theoretical andpractical ; the second essential qualityis found in the speed necessary to beattained, for a vessel of war should befully able to outsail all other vessels,particularly those designed for freight-ing purposes ; and yet the fact is toopalpably plain to be for a momentquestioned, that the navy is behind themerchant service in point of speed,notwithstanding the many varying cir-cumstances to which

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